Demountable rim



Oct. 23 1923.

DEMOUNTABLE .RIM

E. E. FREDERICK Filed Dec. 27. 1921 VVK WITNESS' ATTORN EY Patented Oct. 23, 1923.

UNITED STATES EDWIN E. FREDERICK, OF WINTERHAVEN, FLORIDA.

DEMOUNTABLE RIM.

Application led December 27, 1921. i Serial No. 525,635.

To all whom t may concern:

Be it known that I, EDWIN E. FREDERICK, a citizen ot' the United States, residing at Vinterhaven, in the county of Poll: and State of Florida, have invented a new and useful Improvement in Demountable Rims, of which the following is a specification.

This invention has reference to demountable automobile rims, whereby to facilitate the application and removal of pneumatic tires to and from automobile wheels, and the invention comprises two telescoping or overlapping -ring members, each with an outstanding tire-retaining flange to hold the tire in place, with one ring provided with a circular series of slots at that edge of the ring remote trom its flange, and the other ring having a corresponding circular series of adjustable locking devices adapted to the slots, whereby the locking devices may be caused to engage in the slots and be rotated in and with relation to said slots to connect one ring to the other in a manner to prevent the rings :trom moving one on the other, and so disconnecting.

The pneumatic tire is slipped onto one ring, and the other ring is telescoped on to the first ring, and then the two rings are united by clips or lugs to fasten the telescoped rings together.

rhe pneumatic tire, when inliated, is held from spreading by the clips or lugs employed, which clips are of a nature to resist spreading apart of the connected rings, and the lockingdevices employed are pre vented from escaping and releasing the tire under internal pressure, by the presence of the beads of the tire engaging the outstanding flanges, while the tire may be readily released, on deflation, in the same manner as occurs with solid channel rims, except that the channel riin is a two-part structure instead et being a solid, or one-piece. structure.

The invention will be best understood from a consideration of the following detailed description, taken in connection with the accompanying drawing, forming part ot this specification with the understanding,

however, that the invention is not confined to any strict conformityl with the showing of the drawing, but may be changed and modilied, so long as such changes and modications mark no material departure from the salient features of the invention as eX- pressed in the appended claims.

In the drawing:

Figure l is a perspective view of the rings composing the rim, and shown in displayed relation;

lligure 2 is a cross section of the ring in associated relation, showing a pneumatic tire in place and the rim mounted on a wheel telly;

Figure 3 is a plan view o'l a small p0rtion'oit' the ring with the tire omit-ted;

Figure d is a cross section of the assembled tire and rim, without the wheel telly;

Figure 5 is a. view similar to Figure 4 but illustrating a modification.

Referring to the drawing, there 1s shown a rim composed o'll two ring members A and B, capable ot telescoping one in the other, and, while in the main they are similar, they diiler in some details. The ring A is a l'lat ring of sheet or cast metal, with a flange l about one edge, and the ring B is also a flat ring oi sheet or cast metal of larger diameter so as to telescope the ring A, and is provided with ainarginal llange 2 on the edge remote trom the flange l, so that when the two rings are telescoped together, they produce a tire-receiving channel to retain a pneumatic tire 3 with an inner tube 4, therein.

To hold the two rings A and B together, the ring B carries a circularseries of swivel buttons 5, each having a flattened head of a width to enter a flattened mouth 6, leading into the enlarged interior oi a locking slot 8, formed in the ring A, there being` a circular series of such slots so that when the buttons 5 `are in place and turned crosswise of the mouths 6, the ring A is held at regularly spaced points with respect to the ring B, wherefore neither ring is then capable el' rotating with respect to the other ring, or ot otherwise moving Awith relation thereto.

The inner ring A is provided with slots 14e, extending inwardly from the inner edge of the ring partway across the ring and between the slots 8. This provides a certain degree of flexibility or resiliency for the inner edge of the ring so that it may be forced more readily against the inner side of the outer ring B by the locking devices hereinafter described.

l'n order to provide an equal distribution of locking devices between the two rings, there should be at least three pairs of coacting locking devices about the rim, and in larger wheels a greater number of such loci;- ing devices may be employed. In the drawing, three rotatable locking devices 5 and locking slots 8 are indicated, but this does not preclude the use 01"' a greater number, where conditions warrant. When it is desired to mount a pneumatic tire on the rim, the tire casing 3 with the inner tube i there-l in, is placed about the ring B, which may be supported upon a floor or other fiat surtace, and the ring A is telescoped into the ring B, with the buttons 5 alined with the mouths 3, when the two rings A and B are moved to-I gether axially to an extent to admit the buttons 5 into the locking slots 8 and also permit them to be turned within these slots until they are crosswise of the mouths (i, thus preventing the escape of the buttons 5 from the slots c3, said buttons fitting closely in the slots, which are circular.

New the parts are in position to be applied to a wheel telly, indicated at 9, in Fig. 2, to which telly the connected rings A and B with the tire casing 3 in place, are united by means of a suitable number of bolts l0 and retaining clips or lugs 1l, such as are customary in demountable rims. lt will be noted that the width ot the ring A is somewhatle s than the width oif ring B but is greater in width than the width of the telly 9, so that the tree edge ot the ring A extends beyond the side ot the :telly where the clips are provided. Each lug or clip ll terminates in a clamp block l2 having a wedge-shaped tongue 13 engaging between the telly rim l5 and the'tree inner edge ot the ring A at one side of a respective slot lll, whereby when the bolts are screwed into place, the tongue presses the :tree edge of the ring A against the ring B, so as to lock the two parts together, preventing squeaking, and overcoming any tendency of the rim slipping on the wheel. The clamp block is rounded outwardly to form a seat for the rounded corner of the ring B from which the iiange 2 extends, while an outwardly curved edge l52t of the telly rim l5 provides a seat for the rounded corner from which extends the flange l ot the rim A. By this means the two rims are held firmly by the means employed to secure the rim to the wheel.

lilith the parts arranged as described, the pneumatic tire is sustained by the telescoping members A and B, held together against expansion under the action of the pumped up inner tube t, so that they will not spread when the tire is iniiated, and the ring members A and B also will not rotate or slip, one on the other, under the stresses they re* ceive from movements of the wheel.

Instead ot' employing swivel buttons 5 to loclr the two ring members A and B ton gether against spreading apart, the ar rangement of Fig. 5 may be used. In this case, illustrated in Figure 5, the ring member A is provided with a series of screws 16 countersunlr into the member A and thread ed into the member B, so that the screwsv will hold the two members against slipping, one on the other, and anchor them from displacement. lt is to be understood that in Figure 5, the bolts i0, the telly 9, and the clamp blocks l2, are used lilrc the arrangement oi' Fig. 2. lt is also to be understood that instead oi using a fiat-head screw as shown, a square or hexagonal, or other shaped, screw, may be used.

The swivel buttons may be mounted very slightly oli-center with reference to the slots 8, so as to cramp therein and bind the two rings together.

The characteristic feature of this inverr tion is the fact that the part or member ot the rim upon which the tinV its is the full width of the rim, and this enables the other part or member to be placed in position with pertect ease; moreover, there is no break or joint in the rim and the part upon which the tire rests is perfectly smooth having only one holo for the valve stem and iinallv the wedge-shaped tongue of the retaining clip engages with the tree edge of the ring A and holds it against the outside et the ring B. lhile two-part rims are not new, none oit. them possess the Yleatures mentioned.

vJiliat is claimed is:

i. .ft demountable rim comprising two solid ring members telescoping one on the other, each of said members being formed ot' a hat ring portion with an outstanding flange at one edge, one member resting upon the outer tace of the other member and extending the full width of the rim and having a series of holes, one of which is for the valve stem, fastening means having heads filling and seated iiush in said holes except the hole for the valve stem, and the other ring member having locking slots to be engagedV by said fastening means, and also provided with a series of spaced slots extending inwardly from its tree edge along the ring member and spaced from each other as well as the locking slots.

2. In combination with ya ltelly, a demountable rim comprising two ring members telescoping one on the other, each of said members being formed or" a flat ring portion with an outstanding flange at one edge, one member resting upon the outer face of the other member and extending the full width of the rim, and the said other member being ot less width than the first mentioned member, said telly having a rim provided with a iixed flange irtending .about the outer edge of the ring member of less width, a retaining clip at one side of the telly provided lwith a tongue tting between the telly rim and the tree edge ot the seeondmentioned member, and an outwardly extending clamp block provided on the clip to engage the outer edge ot the first-mentioned member.

3.1n combination with a telly, a demountable rim comprising two ring members telescoping one on the other, each ot said members being tormed ot a fiat ring portion with an outstanding flange at one edge, the flange being joinec with the fiat portion by a rounded bend, one member resting upon the outer tace ot the other member and extending the tull width ot the V rim, and said other member being ot less width than the irst mentioned member, but ot greater Width than the telly, means tor connecting the members, said telly having a rim provided at one side with an outwardly curved edge engaging about the rounded bend ot the second-mentioned member, and a retaining clip at the other side ot the telly having a wedge-shaped tongue fitting between the telly rim and the tree edge ot the second-mentioned member and pressing against said tree edge, and a clamp block provided with an outwardly extending seat to fit and engage the rounded corner ot the first mentioned member.

4. In combination with a telly, a demountable rim comprising two ring members telescoping one on the other, each ot said members being tormed ot a flat ring portion with an outstanding flange at one edge, one member resting upon the outer tace ot the other member and extending the full Width ot the rim, and said other member being ot less Width than the trstmentioned member, said telly having a rim provided with an outstanding edge at one side ot the telly engaging the outer edge of the member ot less width, a retaining clip provided at the side ot the tell opposite said outstanding edge and provi ed with a wedge-shaped tongue fitting "between the telly rim and the tree edge ot the secondmentioned member, which tree edge projects beyond that side ot the telly carrying the retaining clip, and said clip having a clamp block engaging with the rst-me'ntioned member at the outer edge thereot.

5. In combination with a telly, a rim comprising two axially separable telescoping rings with flat meeting faces and outstanding flanges at the opposite edges, means for connecting the rings to hold them trom relative movement, a slot provided in the edge ot the inner ring, and means tor connecting the rim to the telly, said means being provided with a wedge-shaped tongue to engage between the telly rim and the tree edge ot said inner ring adjacent said slot to hold the inner ring against the outer ring and prevent the rim trom slipping on the telly.

In testimony that I cla-im the foregoing as my own, l have hereto aixed my signature.

EDWIN E. FREDERICK. 

